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fn-ui-avatars
Stop random colors. Initials avatars with deterministic UI
A lightweight, zero-dependency library and React wrapper to generate consistent, colorful initials avatars with Smart Contrast using the UI-Avatars API.
Hello!
I'm Fábio, and I've been a software engineer for over 10 years, mostly focused on the backend and .NET ecosystem. Recently, I’ve been exploring frontend development and decided to tackle a small but real UI frustration I noticed in many web applications.
The Problem:
When building user lists, many developers rely on initials avatar APIs using `background=random`. The result? A chaotic UI where the same user gets a totally different color on every single render or device. If you avoid randomness, everyone gets a boring gray background. To top it off, text color contrast is rarely accessible.
The Solution:
I built fn-ui-avatars — a lightweight, zero-dependency ecosystem (Vanilla JS core + React wrapper component).
By using a quick djb2 hashing algorithm, it guarantees:
Absolute consistency: The same name always yields the exact same background color across devices.
Smart Contrast: It automatically calculates background YIQ luminance to flip the text between black and white for perfect WCAG accessibility.
Zero overhead: No state or database required.
I’ve deployed a live interactive playground so you can see it in action! I would absolutely love to get your feedback on the API design, code, or any features you think are missing. It’s fully open-source and ready for contributors.
Thank you for checking it out!
About fn-ui-avatars on Product Hunt
“Stop random colors. Initials avatars with deterministic UI”
fn-ui-avatars was submitted on Product Hunt and earned 5 upvotes and 1 comments, placing #160 on the daily leaderboard. A lightweight, zero-dependency library and React wrapper to generate consistent, colorful initials avatars with Smart Contrast using the UI-Avatars API.
On the analytics side, fn-ui-avatars competes within Design Tools, Open Source, Developer Tools and GitHub — topics that collectively have 886.5k followers on Product Hunt. The dashboard above tracks how fn-ui-avatars performed against the three products that launched closest to it on the same day.
Who hunted fn-ui-avatars?
fn-ui-avatars was hunted by Fábio Nascimento. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of fn-ui-avatars including community comment highlights and product details, visit the product overview.
Fábio Nascimento